diff --git a/GuideTable.lua b/GuideTable.lua
index 0f4bfe8..95d0ef2 100644
--- a/GuideTable.lua
+++ b/GuideTable.lua
@@ -85,7 +85,7 @@ function objGuideTable:new(oSettings)
 								["replace"] = "|c00a80000"
 							},
 						}
-						for n = 1, getn(opentext) do
+						for n = 1, #opentext do
 							t1[k1].items[k2].str = gsub(t1[k1].items[k2].str, opentext[n]["find"],opentext[n]["replace"])
 						end
 						t1[k1].items[k2].str = gsub(t1[k1].items[k2].str, "#","|r")
diff --git a/README-CoA.md b/README-CoA.md
index 6279906..2f18cc8 100644
--- a/README-CoA.md
+++ b/README-CoA.md
@@ -27,6 +27,13 @@ have thrown `attempt to index global 'arg' (a nil value)` on every
 debug call. Local-shadow `arg = {...}` keeps the rest of each function
 unchanged.
 
+**3. Lua 5.0 `getn` → length operator.** `GuideTable.lua` used the
+Lua 5.0 global `getn(opentext)` to size a colour-substitution table.
+That global is gone in Lua 5.1 (`table.getn` was deprecated and the
+bare `getn` removed entirely). Replaced with `#opentext`. Would have
+crashed on the very first guide load with
+`attempt to call global 'getn' (a nil value)`.
+
 What is still TODO
 ------------------
 
@@ -57,6 +64,8 @@ Files we touched
 
 - `VanillaGuide.toc` — Interface bump, CoA metadata.
 - `Core.lua` — local-shadow `arg = {...}` inside `Di` and `Dv`.
+- `GuideTable.lua` — `getn(opentext)` → `#opentext`.
+- `README.md` — upstream Donations / volunteer-pitch section removed.
 - `README-CoA.md` — this file.
 
 Everything else is the unmodified 1.04.2 import.